
body { 
    font-family: Arial, Helvetica, sans-serif;
    background-color: #f5f5f5;
    justify-content: center;
    align-items: center;
    display: flex;
} 
/*固定标签独占一行*/
label { 
    display: block;
    margin-bottom: 3px;/*标签和输入框之间的距离*/
    margin-top: 3px;
    font-weight: bold;
    width: 400px;


}
/*输入框*/
input[type="text"]{ 
    border: 1px solid #99CCFF;
    padding: 5px;
    width: 300px;
    height: 30px;
    border-radius: 5px;
}
/*文本域*/
textarea { 
    border: 1px solid #99CCFF;
    padding: 5px;
    width: 300px;
    height: 60px;
    border-radius: 5px;
    
}
/*焦点效果：边框变红*/
input:focus, textarea:focus { 
    border: 1px solid #f44336;
    outline: none;
}

label.radio {
    display: inline;
}
/*提交按钮的背景颜色为浅蓝色*/
button[type="submit"] { 
    display: block;
    color:white;
    padding: 12px;
    background-color: #4285f5;
    border: 1px solid #4285f5;
    font-size: 16px;/*按钮的字体大小*/
    font-weight: 500;/*按钮的字体粗细*/
    border-radius: 5px;
}

span{
    display: block;
    font-weight: bold;
}

